Sydnones as Masked Hydrazines for Heterocycle Formation: Reactions of 3-(2-substituted phenyl)sydnones with HCl
作者:Christopher R. Gelvin、Kenneth Turnbull
DOI:10.1002/hlca.19920750619
日期:1992.10.2
general, reaction of 3-(2-substituted phenyl)sydnones with HCl gives products derived from cleavage of the sydnone ring to the corresponding hydrazine and subsequent cyclization to the side chain. In one case, 3-(2-aminophenyl)sydnone (43), the product obtained, l-amino-lH-benzimidazole (47), apparently results from nucleophilic interception by the side chain prior to complete cleavage of the sydnone ring
通常,3-(2-取代的苯基)sydnones与HCl反应,得到的产物是由将sydnone环裂解为相应的肼,然后环化为侧链而得到的。在一种情况下,获得的产物3-(2-氨基苯基)亚砜(43),1-氨基-1 H-苯并咪唑(47),显然是由于在亚砜环完全裂解之前被侧链的亲核拦截所致。